My thanks to MailChimp for sponsoring this week’s DF RSS feed to promote ChimpKit, a complete Objective-C wrapper for their MailChimp API. MailChimp is a terrific email marketing and mailing list service, and ChimpKit lets you connect email addresses and add them to mailing lists from directly within your app itself.

Try it out and MailChimp will give you six months of free, unlimited sending — no matter how big your list, or how frequent your messages. If you’ve got an app published on the App Store, sign up and MailChimp will comp your account. Now that’s a great demo offer.